Tube-expander.



G. WIEDEKE, SR.

Patented Aug. 10, 1909.

Witwe/.sua

UNITED sTATEs PATENT oEEroE.

GUSTAV WIEDEKE, SR., OF DAYTON, OHIO, ASSIGNOR TO GUSTAV WIEDEKE &COMPANY,

OF DAYTON, OHIO, A FIRM.

i TUBE-EXr-ANDER.

Speccation of Letters Patent.

Patented Aug. 10, 1909.

To all whom it 'may concern: Be it known that I, GUsTAv WIEDEKE, Sr.,citizen ofthe United States, residing at Dayton, in the county ofMontgomery and State of Ohio, have invented certain new anduseful Imrovements in Tube-Expanders; and I do dec are the following to bea full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification. This invention relates to new and useful improvements intube expanders for expanding the ends of tubes to rigidly secure them toboiler heads or tube sheets. In the process of using these tools, muchhandling or manipulation of the same is incidental, and the guard beingan inde endent part of the implement, it is desirablieJ that it beplaced thereon in a manner that will avoid its detaciment in handling ormanipulating the too The object of the present invention is to providemeans for maintaining the guard upon the tool at all times in anoperative condition and without employing a greater number of parts thanis desirable, as will be hereinafter described in the specification andpointed out in the claim.

Preceding a detailed description of the invention, reference is made tothe accompanying drawings, of which- Figure 1, is a longitudinalelevation of a tube expander having my improvements applied; a portionof the guard is broken away as well as a portion of the mandrel. Fig. 2,

is a sectional view on the line a a of Fig. 1.

In a detail description of the invention, similar reference charactersindicate corresponding arts.

The rol er cage 1 has a suitable number of peripheral openings 5 whichvcommunicate with 4a longitudinal vcentral bore through which themandrel 9 is extended, the mandrel being of the usual tapered form. Therollers 6 are driven outwardly through the cage openings 5 a ainst theinterior surface of the tube in a we -known manner.

` The tube is not shown in the drawings but it will be understood thatthe cage is projected in the end thereof which is to be expanded and theex ansion takes place by rotating the mandrel) from the handle 13. Thecage is provided with an integral flange 2 at the outer end thereof, anda peripheral recess 3 which provides a shoulder 4 around the peripheryof the cage between which and the flange 2 the peripheral recess 3 lies.The guard 7 has an opening 14 which is of sufficient diameter to admitof said guard being passed over the body of the cage against the iiange2. In this position, the guard surrounds the peripheral recess 3 andthere is slight play between the adjacent peripheral shoulder 4 on thecage and the side of the guard.

It is desirable that the guard shall have some looseness upon the cageand also that it may not become detached in handling the implement. Tomeet these requirements, the opposite sides 15 of the guard are giventhe necessary pressure in a vise or otherwise to bring the oppositeedges of the opening 14 a suitable distance inward from the shoulder 4to prevent the guard from slipping over the body or cage of theimplement. In other words, the diameter of the opening 14 in the guardis slightly decreased in one direction so that it is made smaller thanthe diameter of the body of the cage. It will be borne in mind, however,that the pressure thus exerted upon the guard is not sufficient torigidly bind the guard to the cage, and this should not be the case, asit is necessary the guard should be sufficiently yloose within theperipheral recess 3.

The lateral extensions 8 of the guard it will be understood, engage theboiler head or tube sheet (not shown) in a well-known manner, .and thespace 12 between the lateral extensions of the guard and the outerciroulnferenoe of thev cage is occupied by the end oi' the tube when theimplement is in position.

I claim:

In a tube expander, tlieoonibination with a roller Gage supportingexpanding rollers and one end o'l'Wliioli has an integral ilange,

the body of said cage adj aoent-to-said flange being provided with aperipheral recess, ol' a 10 guard supported upon said cage Withinv saidperipheral recess by opposite sides ol said guard being compressedWithin the peripheral recess.

In testimony WliereolI I aHiX my signature, in presence oftWo witnesses;

n GUSTAVl WIEDEKE, SR.

l Witnesses:

MATTI-IEW SIEBLER,

R. J. MCCARTY.

